Add pry-rails
rescue seen_by_users record unique exptioncaused by threadsafe
bug fix for rich html editor's image uploader dialog box not showing on small screen (eg. phone)
Update _html_editor.css.scss

change tabs to 2x whitespaces
Merge pull request #280 from wangqiang1208/bugfixing/seen-by-user-not-unique

rescue seen_by_users record unique exception caused by threadsafe
Merge pull request #269 from jsyeo/jsyeo-add-pry

Add pry-rails
Add Training feature tests
Merge remote-tracking branch 'upstream/development' into training-tests

Conflicts:
	spec/factories.rb
Move training tests to feature folder
Remove redundancy
asm.max_grade is nil when there is no questions in an assessment, fixed
Refactor misnamed variable
Add vagrant
Add instructions for vagrant and clean up readme
Use dotenv to manage our secrets
Merge pull request #282 from sohymg/development

bug fix for rich html editor's image uploader dialog box not showing on ...
Merge pull request #285 from wangqiang1208/bugfixing/empty-asessments

fix for "nil can't be coerced into Float"
Use new expect syntax for mission display test.
Write some tests to test Mission editing functionality.

Add Mission using factory girl.
Add test to check that mission creation has the success message.
Add test to check that edit form loads properly.

Fix merge conflict with lesson plan factory.
Add tests to check editing of Mission title, description and experience.